Experimental study of blasting excavation for large cross
1 Experimental study of blasting excavation for large cross-section the influence of weak structural planes on the smooth blasting excavation are required to be create a new free surface
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An experimental study on infrared radiation and acoustic
Nov 01, 2021 · An experimental study on infrared radiation and acoustic emission characteristics during crack evolution process of loading rock. which had the greatest influence of cracks on the surface IR temperature. Physical modeling of an underground roadway excavation in vertically stratified rock using infrared thermography.
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Computational and experimental study of the influence of
Cita. Díaz Ojeda, Héctor Rubén (2019). Computational and experimental study of the influence of the free surface on rigid and deformable submerged structures.
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Experimental study on the influence of locked-in stress on
Oct 15, 2020 · The rock contains many inclusions which produce high locked-in stress under the ground stress. In order to study the influence of locked-in stress on the mechanical properties of …
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Experimental Study of Influence of Support Failures on
Supports can effectively reinforce the surrounding rock after excavation in underground engineering. However, a support failure may cause an extremely intense rockburst. Hence, the influences of support failures, including support forces, support failure timings, and support failure rates, on rockbursts were systematically investigated in the present study.
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(PDF) Experimental Study of the Behavior of Rectangular
May 21, 2019 · This paper presents an experimental study of the mechanical behavior of a rectangular excavation. supported by a pipe-roof. The study uses an advanced monitoring system, which …
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The experimental study of the surface current excitation
The experimental study of the surface current excitation under the influence of a relativistic electron electromagnetic field . By G. Naumenko, A. Potylitsyn, Yu. Popov and L. Sukhikh. Cite . BibTex; Full citation; Abstract. The problem of the surface current excitation in a conductive targets by a relativistic electron electric field as the
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(PDF) Numerical study on the influence of excavation depth
Numerical study on the influence of excavation depth to pile length ratio on a pile group adjacent to an excavation considering wall movements and ground surface . Experimental study has
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Symmetry | Free Full-Text | Model Test on the Influence of
Oct 25, 2021 · The changes of confining pressure, tunnel settlement, surface settlement and vertical earth pressure caused by surcharge, unloading and excavation are studied and analyzed. The results show that, in soft clay, surcharge will cause tunnel settlement, and unloading and excavation will generally cause tunnel uplift.
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Experimental and Numerical Investigation on the Effects of
The influence of the excavation on the adjacent tunnels is not yet fully understood. This study presented a centrifugal model test about excavation next to existing tunnels in soft soil foundation. The bending moment of diaphragm wall, surface settlement, tunnel deformation, and earth pressure around the tunnel were mainly studied.
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Applied Sciences | Free Full-Text | Experimental Study on
Nov 25, 2021 · In situ stress is one of the most important factors affecting rock dynamic fractures during blasting excavation of deep rock mass that generally is hard rock. In this research, crater blasting experiments on hard rock under different uniaxial static stresses were conducted to investigate the initiation and propagation process of crack networks that were induced by coupled dynamic and static …
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Experimental Research of Excavation Disturbance Effect …
· Jun 10, 2020 · As can be seen from the results: (1) The maximum value of compressive strain arise at the central axis of excavation surface, which is in good accordence with the peak value of the settlement trough; (2) The experimental width of UDA is very close to the width of settlement trough, both of which are increased with the increase of diameter of excavation surface; (3) …
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[0901.2732] The experimental study of the surface current
Jan 18, 2009 · The contradiction between these viewpoints in respect to the surface current on the target downstream surface necessitated the experimental test of this phenomenon. The test performed on electron beam of the 6 MeV microtron showed, that not any surface current is induced on the target downstream surface under the influence of a relativistic
Get a quote(PDF) Experimental Study of the Behavior of Rectangular
May 21, 2019 · The results of study showed that the excavation footage and horizontal stress had a significant influence on the deformation of surrounding rock …
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Different types of tunnel construction equipment - …
Sep 23, 2020 · Crawler loaders. Tunnel boring machine. A tunnel boring machine (TBM), is used to excavate tunnels with a circular cross-section through a variety of soil and rock strata. They may also be used for micro tunneling. They can be designed to bore through anything from hard rock to sand.
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(PDF) Experimental Study of the Influence of Excavation
Experimental Study of the Influence of Excavation Surface Stability and Sand Flowability Caused by Dense Slurry–Earth Pressure Balance Shield Tunneling in Silty Sand …
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[PDF] Experimental study of the progressive collapse
Apr 01, 2017 · DOI: 10.1139/CGJ-2016-0284 Corpus ID: 133469716. Experimental study of the progressive collapse mechanism of excavations retained by cantilever piles @article{Cheng2017ExperimentalSO, title={Experimental study of the progressive collapse mechanism of excavations retained by cantilever piles}, author={Xuesong Cheng and Gang Zheng and Yu Diao and …
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Experimental Study of the Influence of the Surface
Experimental Study of the Influence of the Surface Preparation on the Fatigue Behavior of Polyamide Single Lap Joints Materials (Basel) . 2021 Feb 20;14(4):1008. doi: 10.3390/ma14041008.
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Experimental research on the influence of working
Jan 01, 2020 · Impact rock breaking experiment equipment, shown in Fig. 2, is mainly composed of a drill bit, a drill rod, a rotary sensor, a hydraulic rock drill, a propulsion cylinder, an oil pump system, a lifting guide rail platform, a hydraulic system, a displacement sensor, and a water supply system.The lifting guide rail device lifts hydraulic rock drill with range of 0.5–1.5 m, and provides a guide
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Experimental Study on the Variation Law of Excess Pore
The excavation unloading of deep foundation pits in soft soil areas often produces negative excess pore water pressure. The rebound deformation of soil on the excavation surface of the foundation pit can be predicted reliably through the accurate expression of relevant variation laws. In combination with the principle of effective stress and the general equation of unidirectional seepage
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